Method for reducing viscosity of polystyrene melt

A technology of polystyrene, viscosity, applied in the field of chemical industry and materials

Active Publication Date: 2017-05-10
长春艾德斯新材料有限公司
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research in this field is still in the initial stage, and there is an urgent need to develop ultra-small nano-filler systems with independent intellectual property rights

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for reducing viscosity of polystyrene melt
  • Method for reducing viscosity of polystyrene melt
  • Method for reducing viscosity of polystyrene melt

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] 1. Preparation of Cationic Chain Transfer Reagent

[0043] Principle: Through the esterification reaction, the trithiocarbonate group is covalently linked to the hydroxyhaloalkane, and then the cationic chain transfer reagent is prepared through the quaternization of the halogenated group.

Embodiment 1

[0044] Example 1: Preparation of 11-(2-(n-butyl trithiocarbonate) propionic acid)-N,N,N-trioctylundecane-11 ester-1-ammonium bromide (BPOA)

[0045] Take 4.5g of n-butanethiol and 5.6g of triethylamine and dissolve in 100mL of dichloromethane, under the protection condition of ice-water bath and nitrogen, add 20mL of dichloromethane solution with 4.2g of carbon disulfide to the above mixed solution dropwise After continuing to stir for 20 min, add 20 mL of dichloromethane solution containing 8.4 g of 2-bromopropionic acid dropwise to the above reaction solution. After the dropwise addition, remove the ice-water bath, return to room temperature, and continue stirring for 3 h ; Stop the reaction, remove the solvent by rotary evaporation to obtain the crude product; dissolve the crude product in 100mL of n-pentane, acidify it with 10% hydrochloric acid with a mass fraction of 180mL, and divide it into three times; then wash away excess Hydrochloric acid until the pH value is neut...

Embodiment 2-1

[0050] Example 2-1: K 6 CoW 12 o 40 Preparation of complexes with cationic chain transfer reagents

[0051] Take the K of 0.14g of polymetallic oxygen cluster 6 CoW 12 o 40 Dissolve in 70mL of water, take 0.2g of cationic chain transfer reagent BPOA and dissolve in 70mL of chloroform, the molar ratio of cationic chain transfer reagent to polymetallic oxygen clusters is 5.5:1; under the condition of vigorous stirring, the surface active The chloroform solution of the agent was added dropwise to the aqueous solution of polymetallic oxygen clusters. After the dropwise addition was complete, continue to stir vigorously for 1 hour; A sample of the organic phase, the solvent chloroform can be removed by rotary evaporation to obtain pure K 6 CoW 12 o 40 In complex with cationic chain transfer reagents. The product mass was 0.3 g.

[0052] 3. Preparation of star polymer

[0053] Principle: The trithiocarbonate group on the periphery of the polymetallic oxygen cluster comple...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for reducing the viscosity of polystyrene resin and relates to the technical field of chemical engineering and materials. The method comprises the following steps: firstly, modifying a cationic chain transfer agent containing a trithiocarbonate group on the surface of polyoxometalate through electrostatic interaction, thus obtaining a polyoxometalate compound; then, grafting polystyrene to the periphery of the polyoxometalate compound through an RAFT (Reversible Addition-Fragmentation Chain Transfer) polymerization reaction, thus obtaining a star polymer which takes the polyoxometalate as a core and a polymer as an arm; finally, taking the star polymer as nano filler, and compounding the star polymer to a polystyrene matrix through a solution blending method, thus realizing reduction of the viscosity of a melt. The principle of the method is that through compatibility of a polymer chain on the surface of the polyoxometalate and the polystyrene matrix, the star polymer is introduced into a polystyrene entanglement network, and disentanglement of a polystyrene chain is promoted under a shear condition, so that the viscosity of the polystyrene melt is reduced. The method disclosed by the invention is capable of effectively reducing the viscosity of the polystyrene melt under the condition that the shear speed is switched from 0 to 10<5> rad.S<-1>.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and materials, and specifically relates to a method for promoting disentanglement of polystyrene chains and reducing the melt viscosity of polystyrene chains by using star-shaped polymers with polymetallic oxygen clusters as cores as nanometer fillers. Background technique [0002] Polymer materials, including plastics, rubber, fibers, coatings, etc., have become indispensable and important materials in national economic construction and people's daily life. Polymer materials need to be processed and shaped to obtain the desired shape, structure and performance, and become products with practical value. Common molding methods include extrusion, injection molding, calendering, etc., and these processes are completed through the flow of polymer melt. Therefore, the viscosity of polymer melt is very important to design its processing conditions, and the reduction of viscosity helps the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F212/08C08L25/06C08L51/10
CPCC08F292/00C08F2438/03C08L25/06C08F212/08C08L51/10
Inventor 李昊龙徐天洋
Owner 长春艾德斯新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap